If there is someone to sub with a blower, then the client probably knows it to.
Nope
That's not a safe assumption
Otherwise subbing wouldn't be a thing.
The number of clients that do their own contracting are rare and few.
Most just aren't educated or aware enough to get a hold of everyone they need and would rather not waste the time to try.
When people remodel, they don't call individual guys and contract individually for electrical, paint and texture, structural, masonry and finish carpentry...
They hire a remodel guy.
We're a large outfit
We do a lot of work for small guys, deliver their materials, haul off their overburden, you name it.
Yet people don't necessarily call us directly or little guys would have no work.
Who knows why people choose who they choose, maybe they like their logo better?