Those walks count for something of course, but if you consider that an hour of AeT is worth about 50 hrTSS, then a one-hour Zone 1 walk would be a lower TSS value. How much lower, I don’t know.
Just personally, I’d keep recording these walks in TP since I like to know how many hours a month I devote to fitness, but I’d adjust the TSS to a nominal value to avoid a skewed CTL.