We could argue this forever but lots of analytics and simple math prove that goalies are extremely overrated on a predictive basis. Goalie importance is easy to point to after the fact, but the hard part is figuring the value of goalies and paying for that in advance.
In advance if you choose between MAF and Subban in a playoff series, MAF predictively saves one, maybe two, more shots over a series. That's just math. Except for rare cases of bad sequencing, this rarely would change the ultimate result. Of course anything can happen and the way perception works is fans and team management believe a goalie won a series for them and then overpayment begins. Meanwhile few stop to think maybe another goalie could have done the same or a little less and the team still wins a series.
Mathematically goalies get overrated and strategic thinking can prove it. However GMs and fan bases never figure this out.