I'm sure there are some really good quality 1" straps. I've just never found them at a reasonable price. A typical all metal ratchet with a 30' 2" strap is around $15 and lasts for - basically forever. I've yet to find a decent 1" strap with a high quality ratchet mechanism that's similar in cost.
There's nothing you could ever haul on the roof given the 200lb weight limit that would justify a 2" strap for strength. It's mostly just the availability of quality ratchet mechanisms and strap materials on 1" size that is the deal breaker. I have half a dozen 1" ratchet straps around. They all end up not working very well after a few years.
The 30’ length is a little tough to work with on the roof too, let’s be honest.
I have my share of crappy 1” straps, they work inside just fine but yes, at some point if you use them a lot outdoors, they turn to shit. Not going to argue that point.
It’s just like other stuff though, I consider them consumables and I carry some spares if something breaks or someone else needs one temporarily. Like to strap up a lower control arm or what have you.