The striker left his coaching role with Arsenal to continue his role with Sky Sports.
The former striker had been working with the Gunners as he works towards his UEFA A license.
They had been impressed by the work he was doing, going so far as to offer him the role of assistant manager with the under-18s.
However, Gunners boss Arsene Wenger had allegedly insisted that he could only take up the role should he agree to stop working as a pundit with Sky Sports.
The 38-year-old rejected that proposal though, instead electing to depart the Emirates Stadium and continue his coaching badges elsewhere.
The decision has been met with dismay by some Arsenal fans, but Hartson says he agrees with the reasoning behind it.
“I think if you’re going to be at Arsenal and try and teach the young players, then it’s a full time role,” he told talkSPORT.
“You can’t do it half-heartedly and I’m sure deep down Thierry Henry understands that you’ve got to do one or the other. I think you’ve got to go down one road or the other.”
It now remains to be seen where Henry will move to next, with a number of clubs likely to be keen to add him to their coaching staff.
Indeed, it seems the offers have already come in, with the Telegraph reporting that both West Ham United and Watford have held talks about a potential move for him.