I worked in payroll at one point for 2 years, and currently need to ring up sales and cellphone repair costs...
Yet everyone knows I suck at math, I didn't even bother taking it as a graduating subject, chose history instead.
I'm not sure exactly what type of non-specific to math jobs require we be good at math, but IMO that's exactly what calculators and excel was invented for.
We can't be great at everything, there's no shame in admitting our shortcomings, but like you've subsequently discovered, there is great shame in blaming them on a dx that has no bearing on them.
I hope you can stop hiding behind your BP, it would at best, not only cause you less grief, but also make you more authentic, for yourself.