Maybe an outdated opinion:
Other than saying that “he was a talented goalkeeper in his day” on his own LinkedIn profile, I can’t find who Aled Williams actually played for.
Coaching badges are one thing, but is that enough without top level actual experience?
Players often enjoy / benefit from having coaches or managers who can say “been there, done it, understand your mindset” etc.
Lampard is revered because he can say that. Plus he’s been coached by the best and players know that. I’m sure that when he speaks, not many are going to say “what does he know?”
MR had Man U, Ferguson, playing abroad etc to cite.
WRT goalkeeper coaches, it’d be hard to say that Oggy hadn’t “been there”, he could point to his Liverpool days for a start.
WRT Williams, he might have all the coupons but will any of the keepers he’s tried to develop actually revere / respect him enough?
As I said, might be an outdated opinion but there it is.