Graduate job offer query - tax accountancy

[soncareer]

Does anyone work in accountancy/finance? One of my sons has been offered a grad training scheme with a mid level company. It’s for tax to do the CTA and ATT qualifications.
It’s not something I really know anything about - work in a completely different field so don’t really feel able to advise him.
If he went ahead with this would specialising in tax (rather than trying to get a role with a company who would support him doing the wider ACA) really limit his future potential career opportunities?
(It's been a tough slog to get this offer so he's under no illusion that actually getting something else wouldn't be easy !)
Thanks for any info ...

Thanks so much for all these answers. I feel so much better informed now.

I would 100% do tax over audit. As someone else said, general financial accounting is largely being outsourced to Eastern Europe or will be AI’d out of existence. My tax colleagues by comparison have enjoyable well paid careers and are in very short supply. The CTA is an excellent TV qualification.

Thanks @jcurve