87% of companies in the bitcoin space support SegWit: https://coin.dance/poli
Over 80% of users are running nodes that support SegWit.
100% of wallets are compatible with a SegWit chain because SegWit is backwards compatible.
Over 80% of the mining power has said it supports SegWit being activated right away.
UASF is being positioned as a hugely contentious risk. But it's just a nudge to get bitcoin over to the other side of the SegWit debate.
When SegWit activates the drama will not die down. There will then be a big debate focussing on 2Mb blocks. This is part of bitcoin. It won't change. Accept that there will always be politics and that there will be price volatility and that there will be people promoting altcoins.
UASF should happen because of all this support. If it doesn't though, it won't and everything will keep on ticking too.