My T said the same thing to me. Even used the alcohol metaphor as well. It makes sense but I identify with you about wanting that safety net. I took my tools and put them in a box. I just put the box away and out of sight. I got rid of the tools in my car because I'm always in my car.
In some ways, I feel like my T took self harm away from me. To ad our that, my advice for you is to make the decision on your own. If you decide to get rid of them, do it for yourself and not because your T urged you to. Of course the goal is to one day live without self harm, but getting there needs to come from your own desires.
Sending hugs your way