All I can say is in 25 years doing it this way I have never had a problem, but if nuts rs has lots of crap floating around in his brake lines it's his choice.
Any crap floating around would be forced out with the fluid carrying it, if the fluid didn't carry it it would not be able to go anywhere anyway, where is the last place the fluid goes under pressure, outside, i'm not talking 500 psi here, just 10/15psi will get the job done.
I personally never follow a sequence either as I have never yet found it to be of any benefit, I also use a eezibleed, on the front and rear of my cars including the cossie and it's perfect every time, but I use 10 year fluid, usafe stuff.
tabetha