That may be true, but as Pip Star says, the platform is so off-putting that you must lose lots of potential customers (and I'm one of them). IMO the same goes for the web site, which is a complete mess, especially the way it goes round in circles between the .co.uk and .com versions, then often takes you to a dead end, by which time you're still none the wiser.
If you can't work out how to place a trade with TWS, you shouldn't be trading. In any case there are lots of third party platforms that work with it.
There are so many good attributes of IB, that they vastly outweigh any time spent getting familiar with TWS.