Personally, no, because I enjoy grooming and have the kit and skill to do it myself, though it takes me a while as its very hard on my back/hands.
If I did not have DP here to help, I would use a groomer, yes.
I have a stinky hound, a frilly sighthound and a heavy coated tibetan thing, so grooming does have to be done or there will be welfare issues.
Judging by the number of clients my groomer friends have, and still have despite lockdowns and pandemic restrictions, and their waiting lists... I'd say plenty of people do.
In my experience, those who do, typically do not do enough grooming in between and do not take their dog frequently enough - for some breeds, six weeks is too long if you aren't skilled at combing/brushing down to the skin, and many people seem to think that they can literally not touch the dog for the entire six weeks!
My best friends poodle is groomed weekly, though she does most of it herself as it means she can do it in small bursts and tidy the dog up as and when necessary - leaving her six weeks would result in a badly matted little dog!
It may seem like a luxury but if you have a coated breed, either you do it yourself iwth all the kit, properly, or you pay someone else and neither option is cheap!
Decent clippers -£200+
Grooming table - £100+
Blaster - £50 - 200+ (very dependent on size of dog)
Specialist bathing gear ££££loads!
Combs - £20
Scissors -£30 - 300+
Brushes, shampoos, conditioners another £100..
Whilst it pays for itself over time you're looking at £500+ for grooming a small to medium breed dog and considerably more if you have a giant breed - plus of course your time in doing it.
A full groom when the Tibetan Thing was in full coat (he is clipped down like a schnauzer now as he is old) took 3 hours - thats a comb through, full shampoo, condition, brush out properly and blow dry. That needed doing for his coat type, every three/four weeks, and he is only a small dog (12kg).
Something like a Bernedoodle, Sheepadoodle, Standard Labradoodle - that might be a five hour job at home (without the benefit of a big blaster, drying cabinet etc).