Swinging and missing is fine as long as the swing isn’t debilitating and the miss doesn’t make you gun shy.
The 49ers had Garrappolo, then traded a bunch for Lance and quickly pivoted to Purdy.
The Eagles had, Bradford, then Foles, then Wentz and then Hurts. They just kept trying.
The issue IMO isn’t “making the mistake”, it’s not quickly moving on from it.