I don't think the training methods are to blame, otherwise we would have the same number of injuries every year.
We have a full squad, but are hugely reliant on the same (attacking) players week in, week out.
If everyone is fit we know that it will be Dele, Ericksen, Kane and probably Son.
The question about the quality of depth is a different question, as has been said many times in the transfer thread, it's either;
Spend a shit load on one player.
Counter: Who is going to be better than the 4 mentioned above and therefore would be happy to sit on the bench unless they're being paid large wages and we have to shift players first.
Spend a shit load on 3 or 4 players.
Counter: As above
To answer the OP I think it is a combination of all 3.
Bad luck, especially getting so many injuries in the 1 position.
Bad management, not subbing key players early when a game is won, leading to the back up players not being match sharp.
We have a full squad, but are hugely reliant on the same (attacking) players week in, week out.
If everyone is fit we know that it will be Dele, Ericksen, Kane and probably Son.
The question about the quality of depth is a different question, as has been said many times in the transfer thread, it's either;
Spend a shit load on one player.
Counter: Who is going to be better than the 4 mentioned above and therefore would be happy to sit on the bench unless they're being paid large wages and we have to shift players first.
Spend a shit load on 3 or 4 players.
Counter: As above
To answer the OP I think it is a combination of all 3.
Bad luck, especially getting so many injuries in the 1 position.
Bad management, not subbing key players early when a game is won, leading to the back up players not being match sharp.