Better in the long run.
In the fashion world, the smart - typically smaller - makers are championing 'slow'. Among other things, they're offering repairs services*
as part of their customer care. After all, a garment that can be repaired instead of replaced is a lower impact garment.
Why aren't sportswear manufacturers doing it?
Mainly because most performance wear has complex seams (taped seams are a good example - you might find those inside a fancy rainproof shell jacket) that can't easily be fixed if they break.
We're not part of the fashion world, but we like the idea of building longevity into our clothing - so during the design phase, we decided not to use any seam construction that can't be repaired.
We're calling this fixability.
Running shorts, t-shirts and vests need to be comfortable, and not chafe while you're moving in them. So that means 'flatlock' seams - where the fabric panels are joined by strong tracking stitches that lie against the body.
If you're handy with a needle and thread or sewing machine, or know someone that is, on the rare occasion that you break a seam, it should be a simple matter to sew it back up.