Yes you do, the vast majority of brands have been reusing flash tubes for several decades across multiple ranges, for example:
Profoto (Pro 6, 7, Pro, Pro Plus), Broncolor (flash man, Pulso 2/4, Pulso F 2/4, Pulso G, Unilite, Minipuls), Elinchrom (two main designs for: Classic, Style FX/BX/RX, D-lite, BXRI/BRX, Quadra A/S/Pro/HS), Bowens (Esprit, Esprit 2, Esprit Gemini, Gemini, then the 3 pin versions for the 750-1000 Ws heads, R/Pro) etc.
I don't see why you'd argue for making a new flash tube each time, using the same design means they can reduce costs with mass production and it makes it much easier to source replacements because you don't have to worry about them abandoning a specific model a few years along (again all on the theme of standardisation).