The Bundesliga is competitive outside of Bayern unlike the Scottish league and Celtic-Rangers. Now I assume that the focus of your question is on Bayern, the gap between and whoever is second or first isn't that different to the gap between the PL champion and the second team. Bayern are just more consistent on a year to year basis.
To put this in numbers, over the last 10 seasons 10 different teams finished in the top 4 of the Bundesliga while 7 different teams finished in the top 4 of the Premier League. If we expand to top 6 places, 14 different teams finished there over 10 seasons in Bundesliga as opposed to 11 teams in PL.
At the bottom end, a number of big clubs who have played Champions League seasons were relegated during those 10 seasons - HSV, Stuttgart, Hertha, Schalke, Bremen, with Wolfsburg avoiding relegation in the playoffs.
In all areas except the top spot it is rather evident that Bundesliga is more 'competitive'. Not 'better', obviously. In fact, as opposed to all those posters conflating the two phenomenons, it could be argued that it is this very competitiveness from places 2 and downwards that lets Bayern in their consistent superiority run away with it more often than not, and come out top constantly.
But money talks, and it does not help that their competitors constantly get raided for their best players by clubs from Liverpool, London, and Manchester
As for the Kane transfer, I am among those who would never, never, have imagined that Kane would actually move to Bundesliga. Observing from Germany, I thought Bayern's pursuit of him (already in recent seasons) was naive, overbearing, and absurd, typical Bayern. Even until today a part of me eagerly anticipated the egg on their sausage faces when it would become clear they were being rejected, like they were with Mount, Rice, Walker (all of whom were reported to be eager to join Bayern by gullible German media). Now that part of me is stunned like Gary Neville.
It is sad that he could not wait another season and join us as a free agent, assuming we will be offering a real prospect of meaningful success and trophies after another season of progress unter ETH. And with Pep and Klopp fading out. But then it is also kind of understandable he cannot wait any longer with no CL football at Spurs.
What bothers me is that we did or could not persuade him to commit to us and clearly push for a transfer the way he did for Bayern.
Because in the end, notwithstanding Levy's aversion to selling to a rival, the player's will has a lot of weight. If Kane had made it clear that he only, unequivocally, wants to join Man United, this summer or next summer if must be, and we offered the kind of money Bayern was offering this summer, Levy would have had a tough decision to make. But in reality, despite all the fantasizing going, there never was any report or indication we were offering him such a proposition. And that is what's sad about it.
In the short term, there is something to be glad about, as Spurs are significantly weakened as a top 4 competitor.
In the medium term, thinking he might have joined on a free next summer, it is sad that we will be missing out on the perfect player for a couple of seasons, English captain, one of incredibly few world class strikers, a position we still are in dire need. I can't bring myself to be optimistic enough to think Hojlund will reach that level anytime soon, if ever. And that is not meant to shit on the kid who I am confident will be good.
In the long term, it makes no sense to put too much weight on individual players, we are on a good way on the footballing side of things.