Marriage is a sacrament. Let’s not forget that, first of all.
Yes, there are times when I lean on my husband. He just came into the church this last Easter, and as we focus on God, we come closer as a couple. It’s not impossible to focus on the Lord while giving your spouse some sort of attention… there are days when I’m so stressed, exhausted, sad, etc (depending on what’s going on), that I (or he) just needs comfort. And when my husband shows me that comfort, I feel the love Jesus has for his church, if only a fraction.
It’s not something we do all the time, or for any extended period of time… and I don’t think it’s something that someone who doesn’t understand that marriage is a sacrament could understand (much as the OP doesn’t). But it doesn’t take away from our focus on the Eucharist.
We’re not focusing on each other. We’re looking towards the Eucharist together.