Washing and bathing once a week

As this is all I can manage, should I get higher points than 'needs an aid [shower stool, grab rail], 2 points'. No way I can use an un-adapted bath or shower. Last time I tried that was years ago and I could hardly get out at all, memorably crippling pain in knees as a result. I thought ability to use un-adapted was supposed to be the 'test'? But what points could I argue for, as I do manage to shower myself, just only once a week.

My [very learned] friend just pointed me to this, I've omitted the items before to avoid cluttering the post, From here:
www.legislation.gov.uk/uksi/2013/377/made
25th February 2013

Regulation 5
SCHEDULE 1
PERSONAL INDEPENDENCE PAYMENT ASSESSMENT
PART 1
INTERPRETATION
1. In this Schedule, —

“bathe” includes get into or out of an unadapted bath or shower;

Hope this is useful, Denby