No, mass texting falls into a legal realm with different guidelines around how customer consent is captured and tracked.
A customer providing a phone number to be notified that their service is complete or for a text receipt does not constitute consent for marketing or mass texting.
To be eligible for mass/marketing messaging, the customer must provide the number explicitly for this purpose and be provided with the ability to opt out through industry standard 'Reply Stop to Opt-out'.
The best way to think of it is Gmail and Mailchimp both send emails, but Gmail is for conversational emails and Mailchimp handles mass emails and consent flows.
🔍 Check out this blog post to learn more about consent.