This all day long.
As someone who chose not to go to university I found my early testing career hampered by “must have degree or equivalent” statements and having the ISEB was a foot in the door (I realise it was in no way an equivalent but it was a pattern-break for HR to go “ooh testing certification; bring him in for interview!”) so I did it in the mid-2000’s.
As a 14 year career tester nowadays when I see ISTQB on a CV I see it as a declaration of intent; the person has studied something they feel will help them to become a better tester. They’re looking to be better than they are currently so perhaps they have the drive to learn more useful techniques and tools and would be a suitable hire so I’d bring them in for interview if the rest of their CV stacked up.
Every person is different and every person has their own reasons for choosing to do or not do a certain training, course, certification etc so on an individual basis I see no problem with the certification.
As an industry though the certification perpetuates the false opinion that passing a simple, multiple choice exam by taking it as many times as you like means a person can do the job to a decent standard. If people who simply aren’t good testers can persuade people they’re great via a certificate and the end result is employers assuming that “the very best ISTQB testers are rubbish, therefore all testers must be” then to me that’s a problem for the entire industry.