The transfer market is a huge part of the equation, otherwise Van Djik, Alisson, Salah etc wouldn’t have won them the title. And they wouldn’t be spending hundreds of millions in this window if they as a club didn’t recognise the importance of signing well.
It won’t always directly impact the upcoming season as loads of factors come in to a single season but the most successful, elite clubs do elite club stuff in the transfer market.
You can pretend otherwise but it just makes you sound thick as fuck.