People are getting too carried away with what the silent letter does to the word. The whole point is words with letters that are silent, not, 'If the silent letter were removed we would say the word differently so it's not a silent letter'.

'Walk' and 'talk' most certainly have a silent 'L'. Talking about what the word would be without the 'L' is besides the point of this conversation.

As for 'vogue' I would submit that it's the 'u' that is silent, not the 'e'.