I understand that in some situations you are better off with fodder ships. My way of thinking is just that 95% of players also feel that way. Almost every fleet that I see, they have mass LF as fodder. That means that cruisers are better. But even without cruisers, you do fine against fodder. In fact cruisers can actually be worse even against fodder, if they have gauss canons, and harder hitting ships.
But it's for sure dependent on the situation. If you find that most of your hits are against more equal targets, then yeah, fodder helps. But in my experience, and also by running sims, the majority of hits I will ever do, LF just result in more losses.
When you outnumber someone 2, 3, 4 to 1, with 20% (or most usually higher) combat techs, then big ships with shields and armor, are going to have less losses. But even in more even battles - some of my most profitable attacks have been draws, where they barely hurt me, thus making it still super profitable for me.
BCs have such good shields and armor, they really can stand on their own in most cases.
And in the end, I still think speed is underrated. It allows for more tight phalanx windows, better probe hits, better ability to ninja, and all around affords you more opportunities to raid, because your fleet is back sooner. As they say - time is the greatest resource in Ogame.
Also, BCs save you tons of deut, which can't really be understated. And if your uni is anything like mine, everyone is neglecting deut mining, and are burning tons of it doing expos, making it hard for me to plunder nearly as much as I'd like.