CREATE TABLE AS SELECT ST_VALIDATE creates a column with datatype point, not geometry

MariaDB [test]> create or replace table tb1 as SELECT  st_validate(POINTFROMTEXT(' POINT( 4 1 ) '))   a  ;

Query OK, 1 row affected (0,070 sec)

Records: 1  Duplicates: 0  Warnings: 0

MariaDB [test]> show create table tb1;   

+-------+---------------------------------------------------------------------------------------------------------------------+

| Table | Create Table                                                                                                        |

+-------+---------------------------------------------------------------------------------------------------------------------+

| tb1   | CREATE TABLE `tb1` (

  `a` point DEFAULT NULL

) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci |

+-------+---------------------------------------------------------------------------------------------------------------------+

1 row in set (0,001 sec)

MariaDB [test]> create or replace table tb1 as SELECT  st_validate(ST_GeomFromText (' linestring( 4 1,4 4 ) '))   a  ;

ERROR 1366 (22007): Incorrect POINT value: 'LINESTRING(4 1,4 4)' for column `test`.`tb1`.`a` at row 1

MariaDB [test]>  SELECT (st_validate (ST_collect(( POINTFROMTEXT(' POINT( 4 1 ) ') ))  ))  a ;

+------------------------------------+

| a                                  |

+------------------------------------+

|                    @      �?  |

+------------------------------------+

1 row in set (0,001 sec)

MariaDB [test]> create table tb2 as  SELECT (st_validate (ST_collect(( POINTFROMTEXT(' POINT( 4 1 ) ') ))  ))  a ;

ERROR 1366 (22007): Incorrect POINT value: 'MULTIPOINT(4 1)' for column `test`.`tb2`.`a` at row 1