IMHO dividend-yielding shares are another way to fool people.

The dividend that you get is discounted to the price immediately, so the dividend it's just an 'illusion' of profit, however, it's a very 'real' taxable income.

Just to put things in perspective, Berkshire Hattaway (Warren Buffet's company), never ever paid a dividend.

I feel sorry about your husband's attitude :(
He probably has a lot of qualities, but maybe 'not to be impulsive' isn't one of them.

Being 100% cold, I would recommend you store your own holdings in a segregated way (don't allow him to control anything, rather than his own budget).

This is how I do with my lady, we both have 6 figures portfolios, I like her to stay independent, and even though we learn and talk about it often (crypto strategy's/thoughts/feelings our accounts are 100% segregated and no one has control over the other in that sense.

Hope that works for you!