For me it is just a descriptive term that helps describe what type of cycling someone is more interested in, a mountain biker, a tourer, a commuter - non to me are derogative terms, just a better way of describing a cyclist. Just in the same way of elaborating on "I have a job" one could say I work in construction or even I'm a chippy.
And of course there are plenty who' cycling does not fit into any special category, or may be a mixture of several categories - and nothing wrong with that either.
I read somewhere about a "proper cyclist" who was in races and all that but commuted on an ebike
H ehad to do that because he had the sort of job where he had to arrive smart and ready to go - no where to change and have a shower or anything
Hence he couldn;t get to work all sweaty but the route involved hills and some distance
So he went into work on an ebike so he could get there fresh and non sweaty by using the motor to get up the hills
Then on the way home he could change to cycling clothes in the toilets switch the same bike to "Off" mode and ride it home "properly" and get there needing a shower.
so one person, one bike - ebike commuter in the morning - roadie on the way home