You're missing the "makes" part of the statement. In your slip road example, most sensible drivers on the motorway would create a space for vehicles entering from a slip road by adjusting their speed to create a gap or by moving into the other lane if safe to do so.
Well, I think you’re changing the terms of the examples to suit your agenda. In my slip road scenario, you’ve for some reason assumed that the other drivers are ‘sensible’ and moving over nice and early. Clearly, this doesn’t always happen, so you can be as sensible as you like on the slip road, matching speed, attempting to merge… but many drivers will grudgingly leave it to the last minute to move right. So you’re effectively ‘making’ them move.
In OP’s example, you’re again assuming that the other road users are sensible and that she’s in the wrong. But, again, the knucklehead driving at 90mph right up the back of other road users is not driving sensibly. There’s a far greater chance that OP is driving sensibly, given the evidence we have, but you’re still determined to back knucklehead-90mph-guy. You’re inventing all sorts of details about OP having pulled out unsafely. Much mire likely is that knucklehead has covered a mile in way less than a minute and is up her arse while she’s completing her safe over-taking.
Honestly, the absolute desperation of some posters to find an OP unreasonable is just madness.
She’s explained a perfectly legitimate gripe - bullying speeders who flash their lights and drive unsafely close. And out come all the far-flung reasons why OP is probably a danger. Even to the point of suggesting all those speeding BMW drivers are plain clothes police 🙄
There’s also a weird sort of boasting going on (see @CantHoldMeDown ) where we’re supposed to be impressed by how fast and clever people are behind the wheel, even though we have literally no evidence of this. It’s all very childish.