With a few caveats, yes it's all true.
Microlights are great fun, good value, and many of the newer types will leave a typical flying club light aircraft standing performance wise - needing much less runway, and cruising a bit faster, whilst using a lot less fuel.
Light aircraft instructors are often building up experience aiming for an airline job, and also there are usually more instructors available than instructors jobs. You can't build hours in a microlight towards an airline licence, and hence the economics of the industry tend to force it to pay instructors enough to live on and stay. Also, many microlight schools and instructors are actively involved in providing maintenance, hangerage, aircraft sales and so-on - which provide further income that doesn't exist so much in the light aircraft world.
Safetywise, it's not quite true to say that microlights come out as safe as "group A", but not far off. Statistics show certified group A at 1 fatality per 70-80,000hrs, whilst microlights sit around 1 per 50,000 hours which is similar to light helicopters and gliders, but not quite as good as group A. Ultimately however, both are pretty darned safe in the UK.
But, as Whopity says, what you really want to do is go and do some flying in some. Bear in mind that there are two main classes (3-axis, which is similar to what you've been flying now: and flexwing, based upon a Rogallo, or Hang-glider wing), and also that there is probably more variety of common aircraft types in the microlight world than you'll find in the light aircraft world.
G