I think Jose will be in the best position to give an accurate answer to your question but to a very large extent, I think your observation is spot on. Jose does like very physical players and many of such players tend to have some height.
There was this post on a site some years ago when Jose managed Madrid. You might find it relevant to your post:
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Real Madrid and Barcelona height comparison
Real Madrid
Casillas - 185
Pepe -187
Carvalho - 184
Ramos - 183
Coentrao - 180
Alonso - 183
Khedira - 189
Ozil - 182
Di Maria - 182
Higuain - 184
Ronaldo - 185
Avarage height - 184 cm (all players are tall)
Barcelona
Valdes - 183
Puyol - 177
Pique - 192
Alves - 170
Adriano - 170
Busquets - 189
Iniesta - 170
Xavi - 170
Pedro - 170
Sanchez - 170
Messi - 170
Average height - 174 cm (only 2 players are tall)
as we can see R.Madrid mostly buy tall players and Barcelona short players. This must be their philosophy. what is the reason for this and which club does it right?
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So, that was someone also wondering why Jose's team was so tall in Spain. Interestingly, the average height of the Real Madrid team today is about 5'11". It has suddenly grown short! Co-incidence? I don't think so.
Maybe this is why people have a particular impression about how his teams play. I agree that tall players tend to be less dynamic (this is in the most general sense as it is not a rule or law. We all know very tall players who are / were incredibly dynamic and short players who are/were not).
I once jokingly said that Jose was always going to be a C.Ronaldo manager rather than a Lionel Messi manager or if he were managing a country, it will likely be one that is very physical.