Yes, PP, incompetence is found in all professions. But a solicitor who advises using an accountant at least has the sense to know his professional or personal limits; a licensed conveyancer may have no such compunction or understanding.
Only time I used a licensed conveyancer he came as part of a package promoted by a large estate agents. I didn't know that I was not getting a solicitor. When I googled and investigated him, I discovered a long list of complaints about him and previous companies associated with him. Then his current firm went bust and the work was transferred to another company, also run by him. The work was, eventually completed; had it not been the simplest possible conveyance, I'd have stopped it in the first place. I can't think that a solicitor in his position, with his record, would have been allowed to practise; the professional body does not like solicitors who go bust or run up a long list of compaints