Badminton and Football aren't comparable in the way you've chosen as that's an individual sport against a team sport (In your scenario) + you've chosen a sport where mixed doubles happens at an elite level and works very well. Plus it is one individual game that has suddenly made a sweeping example of the whole industry. Nobody is suggesting that a full female team could compete with a full male team but there is a possibility that there can be a female to compete at a decent enough level and that's why it's important to have more and more trials of this nature.
I have already said that there will be males who also cannot compete at a high level or make that step up, but that does not mean that there cannot be examples that can. I'm not saying that Silva or Gomes or whoever have absolutely no speed, strength or stamina. Of course to be an elite level footballer you do but the mens game is full of people of different skillsets and of varying ability in them. There is going to be some females who are of a higher stamina than some male elite players or stronger or quicker than them. It's not as simple as just saying Men are more physical than Women and she can't compete, the end.
You don't know that nobody will and there doesn't need to be a barrier if people enjoy it. Your motorsport scenario isn't exclusive to women, males also take seats from others due to money.
I'm glad they're going through with it as there is no other option for her apart from leaving the club. So it's good that they've changed the rules. I'm never against the idea of competing against one another. I just thought woman leagues were made so they can get their shine too. They were made for a reason, not for the same bigoted reasons like the color barrier was enforced.
But for this discussion on whether they can compete, I'm sure there is a level where they can compete at. For example, if you take a pro woman player and make them compete against us, surely they would dominate. However, they will get lost in the shuffle if they compete with men considering the levels to compete at the highest level where there is any visibility.
I don't see that changing. Not even for a single exception.
I think it is as simple as saying that. Truly examine what goes into the smallest players competing. It's not just that they're competing with higher technical skill. They're competing with no disadvantage physically. This means that they can run on a counter attack to be at a specific spot to contribute in the final third more so than a Woman can. This means they can ride tackles in a way a woman can't. This means that they can fake going to the right to open up space for them to affect the game. This means they can last as long as they do on the pitch without being substituted.
There are a lot of small insignificant things you're taking for granted when speaking of someone like Silva or Gomes because the context under which these small technical players make those things insignificant is by being men, where as the context completely changes if it's a woman and those factors can turn into significant factors to prevent a woman from competing against men.
I can imagine if these small technical players like Silva were put into another competition where instead of playing against fellow men, they play against some aliens that are faster and stronger, Silva will no longer be as good as his technical skill affords him to be. The technique required will need to be even better to compensate for an even greater disparity in strength he lacks, greater disparity in agility, greater disparity in time required to control a pass, to make decisions, to shoot, to last as long as his teammates, etc...
) In fact, only the top two leagues (eredivisie and eerste divisie) are fully professional in the Netherlands. So this isn't like playing in the Isthmian League in the UK.