So. If you were buying a non Ebike, something costing £149 out of the argos catalog would be good enough ?. Up to the job etc etc.
I bought a non electric mountain bike (non suspension) from my local bike shop a couple of years ago for £140, a Probike. It was actually £135, but I paid another fiver to have a stand fitted. Has given good service and continues to do so. Last year I fitted a Yose power front wheel kit. £170 for the kit and I used a 15Ah battery I built a while back from cheap Chinese cells (approx £100) that had already done a couple of hundred cycles on another of my bikes. So, all in cost just over £400 for a bike that will do about 50 miles on a charge under "average" conditions - mostly medium assist, a mix of flat and hills.
I have since upgraded the brake callipers to Shimano Alivio. it didn't really need this, the existing ones were perfectly adequate, but the Shimano upgrade was cheap and will future proof the bike.
I do ride it off road at times, but mostly on road. Although it only has about 35Nm torque quoted for the motor, it will get up quite steep dirt tracks no problem at all.
Also, I'm unlikely to get mugged riding it around town, unlike people I know who have been for their £4k bikes.
Let's not forget Les is on a learning curve here. When you first get into e-bikes, your knowledge is next to zero. You have no idea what is good and what isn't, or what even suits you and your situation. Some people love mid drives, others hate them...there's a lot that comes down to personal preference.
I would much rather make my mistakes on a cheap bike that has issues which I can work on and learn something than blow serious money on something unsuitable that I won't learn anything from and I will end up not using.