[sp332]

The post is about people who physically can't do that.

[warrenm]

OP claims the market is "huge"

It's not

It's tiny (at best)

Tiny markets don't tend to get much attention

[falcolas]

It's a market (that is, the market for people with motor control issues in their hands) that every single human on earth (that doesn't die first) will be in later in their lives.

[wnolens]

Bingo