It is true that snakes are typically not much of a problem in most backpacking situations, especially if you keep a clean camp which doesn't attract the rodents which will attract the snakes. Still a lot of us don't exactly enjoy them. They worry me a lot less now than they used to.

You can certainly get out on trips with what you presently own, and with experience you will develop priorities for ways in which you can shave off pounds. I think we have all done that.

Actually, the best reason for carrying an enclosed tent is to keep the bugs away. They probably present more hazards than snakes, depending upon the area in which you are hiking. Year in and year out, honey bees kill more people than snakes in the USA, by a considerable margin.

Where are you hiking? Most of my experience has been in Arizona and southern California, and I have encountered a snake or two.