If you have a good and realistic view of the profession then it could be a good move. I wouldn't write it off due to age
I don't agree with the poster up thread about trainees over 30 being worse, but I do think there are different patterns based on entry. If someone is going to experience difficulty then there tends to be different trends.
E.g. a weaker trainee straight out of university might lack the maturity to deal with constructive criticism, think feedback on lesson observations is personal attacks or sometimes ignore direction because they think as the next generation they're going to be 10 times better than their mentors. The struggles tend to be linked to immaturity and being a bit naive.
If you have a weaker trainee who is older then that tends to come from a place of comparing teaching to their previous job, thinking teaching will be better for pro-life balance than other jobs, lots of 'but I don't see why I should do X, in the real world..'. They often have a reluctance to accept that whilst they are older than their mentors, their mentors are the specialists & if they're being told something didn't work in a lesson or they need to develop X, listen and reflect rather than arrogantly deciding that they know more than their mentors.
As a career changer to teaching myself, I think having a pre teaching career really helped in a number of ways and made my first couple of years easier. Having something before teaching can be a real asset as long as the trainee has the humility and willingness to learn