your dividend income doesnt fall just because the capital value of the stock - portfolio slips
True but why should that be of any comfort to you?
Let's say you have a €100 portfolio that pays you €3 in dividends. During the course of the year the capital value of your portfolio increases by 50%. So, at the end of the year your portfolio is worth €153. That's a total return of 53%.
If your portfolio value instead falls by 50% - but the dividend income is still €3 - your portfolio is worth €53 at the end of the year. That's a total return of -47%.
Dividends are not magic and a stock that consistently pays high dividends is not necessarily better than a stock that pays no dividends at all. I think you are confusing income with value.
Companies with low growth prospects (utilities, tobacco, consumer staples) often pay higher dividends than companies with higher growth prospects (technology stocks, etc.). Which stock would you have preferred to own over the last decade - Johnson & Johnson or Apple?