So, is a biscuit joiner completely useless?

So, is a biscuit joiner completely useless?

SawStop Standalone Cast Iron Router Table - Power Switch in Stand - RT

Do I need a Biscuit Joiner? - Woodworking - Axminster Tools Community Forum

MASTERFORCE 18 Scroll Saw with Rotary Attachment

Southern Biscuit L Formula Complete Biscuit Mix 2 Pack

DeWALT New 20V Cordless Biscuit Joiner - Power Tool News - Power Tool Forum – Tools in Action

Freud JS104K 6.5 amp Biscuit Joiner with Case : : DIY & Tools

Do I need a Biscuit Joiner? - Woodworking - Axminster Tools Community Forum

The only power tool I own is a drill. I know absolutely nothing about woodworking and I have no relevant experience. Am I stupid for thinking I can turn one of these

23 Hole 1-2-3 Blocks — Taylor Toolworks

DEWALT 6.5-Amp Biscuit Joiner Kit