The bench players for big clubs were usually starters in smaller ones.
They get paid better and compete for titles while doing so.
Also, Nico would likely get at least 2k minutes in a club like Barca if he joins.
However, he is more likely to walk into starting lineup for some other big clubs too. Like Bayern and Arsenal, maybe Liverpool.
Yes, you may be right, only that, and thankfully enough, most, if not all players do not think this way.
Your playing time equates your value. The more you play, the more prominent add visible you become, the higher your value gets.
This is why many players dont mind leaving bigger clubs if they have their playing time restricted there, to a relatively smaller one where the national team handlers are able to see them more regularly, especially when events lije the World cup are approaching. He wont be stupid to move to a bench role in a year oreceding the world cup. Not all footballers are daft.
And you are wrong, he cant walk into current Bayern team on both wings, Arsenal is doubful because he does not offer anything better than Martinelli(forget the Euro hype and take time to watch his full matches)and certainly cant unseat a Saka, Liverpool is also up in the air as the only thing he might have above Diaz is pace and Sallah is Mo Sallah