Either way fine to me. I play only SSF these days. Trading can burn for all i care. Though option to SSF with 2-3 people would be great without access to wider public.
I'd stop SSFing in a heartbeat, just so I could get access to build enabling uniques (and the occasional super rng gated item), if only trading weren't such a miserable experience.
As it stands, I'd rather cut my build options by 90% rather than engage in trading.
No one forces you to do zoom-zoom, just play SSF like we do and do whatever you want. Before I've got some upgrades my run speed was like 30% on iceshot ranger (the zoomiest of them all) and I managed to live with that. There is already a choice to do zoom or not to do zoom, but somehow some people want to force everyone to play in the way they (a minority by definition as everyone has their own preferences) want.
You're not "forced", but at the same time, glhf making progress in a reasonable amount of time without some amount of zooming. You need to run hundreds of maps just to reach the endgame and then you still need to run lots of high tier reds, that's going to take forever if you need more than single-digit-minutes per map. It's kinda like arguing you don't have to employ strategy in a jrpg because you can just grind to level 99 in the first area. Technically possible, but also clearly not intended and no one sane would do it.