No. Bulbs are resistive load rather than inductive loads. An inductive load is typical of relay coils, motors, etc where electro-magnetism comes into play. When you try to Interrupt the current flow by switching off, the inductive winding will try to oppose and as no current can flow, a voltage acrues instead and you end up with a fat spark across the switch contacts.. The flyback diode acts as a sort of relief valve by giving a conducting path for the reverse current to flow and stop a build up of volts across the switch contacts.
As I said, I have never had a close look at what’s there and why. Maybe it’s only because they use crappy switches (surely not, Morgan??) and are trying to prolong their life. Only a guess!
Think “miligoons” advice from earlier post is sound, as are others who found it was just poor soldering of connections in the first place. If its done proper, it should last!
