While Mtgox won't be refunding the full amount in BTC that was lost to customers. Only a fraction of it. The upside is that even though it's not the wholesome amounts, the value gains over the years will surely compensate for the lost amount for sure. So yes, in hindsight. the Mtgox incident was a blessing in disguise. Without the hack, majority of those customers would have sold bitcoin at the $20K top in 2017 or the $69K top in 2021 even worse, at the $3K bottom during the lockdown sell-offs but because they couldn't, now they get to rip the full benefits as a hard-core holder would.
That was essentially a "fixed deposit" kind of situation.