Defaults for boards when selecting heli include multi copter frames and non compatibly flight modes.

[thespova]

When heli is selected for vehicle several modes are default selected that Heli usually can not use (probably never use I would think):
Turtle
Throw
Flip (maybe)

I'm not sure if those modes are even compatible with trad heli.

Additionally VTOL frame types are selected, for example:
Deca
Hexa
Octa
Y6

On the Matek H743 ALL VTOL frames are selected by default when doing a trad heli build.

I'm not sure if there is a situation where someone would want these things in a custom build but I don't think they should be default selected.