YANBU.
Finally in my 50s I understand myself and am confident enough to say what I actually want.
I like being able to do an entry level job really, really well. Every time I've been promoted I've regretted it. It always comes with loads of extra baggage and stress for a couple of extra grand.
When I applied for my current job I was asked the usual 'where do you see yourself in 5 years' question. I answered honestly, 'doing this job as an expert'. And I've stuck to that during all of my Development Reviews.
Fortunately in my workplace there is scope for 'promotion' within role, as an acceptance that you can deal efficiently with tricky and obscure cases that newer people are baffled by.
I am happy to support teammates with some of their cases but swerve doing regular training meetings. We have a team coach whose job description covers that. She is a grade higher and I have constantly avoided being persuaded to do that job. There is a lot of hassle for an extra £2k per year.
I work a 9-5 and leave my job when I switch off my computer. Nothing to bring home and worry about.
DH does a much more challenging job, because he would be bored with mine. He has periods of time when he works really long hours, evenings and weekends. I pick up the slack there with shopping, cooking etc and also proof reading his reports. We are a team. He has chosen his route and I have chosen mine.