Using generic FTDI UART TTL converter for MSP430 bootloader

Question

I’m planning to use the FTDI USB-TTL converter to program my MSP430FR5739 using UART. I wanted to use the “BSL scripter” tool provided by TI, but while reading the manual, I came across this: “BSL Scripter v3.1.0.x doesn’t support communication with MSP430 BSL devices without an MSP-BSL (Rocket) or MSP-FET.” I feel like this statement is only valid for invoking BSL using hardware (It makes sense since the RST and TEST pins have a specific sequence in order to enter BSL mode). I am planning to invoke the BSL inside my application code.

My question is: Can I software invoke BSL then use the BSL scripter to program the microcontroller? Or do I have to buy the MSP-BSL or MSP-FET Tool? Has anyone tried using the BSL as I’m thinking of? Does the BSL scripter give an error when it realises that the hardware bridge isn't a MSP-FET or MSP-BSL?

Thank you in advance.