I your light dimmer fails and starts melting the casing, do you have some temp sensor there to take care of it? If the current is within your fuses or your circuit breaker rating, you are out of luck. There's no easy, cheap, failproof, out of the box protection for these situations.
Failure would hurt Schneider a lot, some undefined fake Fotec AE vendor not at all.
Of course, this is forum for sharing opinions, helping, getting help...