I've done the quick patch thing before, and yeah, it usually holds up fine for a bit... but how long are we talking here? If it's already pretty rough, wouldn't you just end up redoing it anyway down the road?
I patched up some flashing around my chimney last year thinking it'd buy me a couple months tops. Honestly, I was surprised—it held up through winter and spring storms without leaking. But by summer, I noticed it was starting to peel back again. Ended up redoing the whole thing properly anyway, which wasn't as bad as I thought it'd be.
If yours is already looking pretty rough, you're probably right—you're just kicking the can down the road. But hey, sometimes that's exactly what you need. A quick fix can buy you time to plan things out, save up a bit, or wait for better weather. No shame in that. Just keep an eye on it and don't let it go too long... learned that one the hard way myself.
